* code refactoring: created a PropEdit class for property editor
windows, moved Table class from mainwindow to paramedit
* minor gui tweaks: made note entry fields a bit wider, set a minimum
width for scales
* bug fix: avoid stale information in the instrument properties window
when a new file is loaded or the instrument is removed

* in "Save As..." dialog set inital filename to "copy_of_<filename>" and
show a warning message that saving to the same .gig file will corrupt
the sample wave data
* added autoconf test for the recent virtual MIDI device support on LS
side to prevent compile time errors when compiling gigedit against an
old LS version

* bugfix: key highlighting of active keys on the virtual keyboard is now
working on multiple invocations from the sampler as well
* renamed misleading names regarding the gig format's "keyswitching"
feature (the dimension is now displayed as "keyswitching" instead of
"keyboard" in the dimregchooser widget and the two parameters for
defining the actual keyswitching area on the keyboard in the instruments
properties dialog are now called "Keyswitching range low/high" instead of
"Dimension key range low/high")

* first step to make the virtual keyboard interactive: active keys of the
sampler (in live-mode only of course) are highlighted on the virtual
keyboard - NOTE: yet inaccurate draw of the keys and this mechanism
yet only works on the first gigedit invocation by the sampler process,
so this still has to be fixed

* gig files where regions are not internally ordered are now handled
* the resize mouse pointer is not shown anymore for regions that can't
be resized
* the region and dimregion chooser widgets are now resizable
* bugfix: sometimes you could not delete more than one dimension
* filter headers are now also greyed out when the filter is inactive

* added status bar to the bottom of main window (independent area on the
right shows whether gigedit is running stand-alone or attached to
LinuxSampler)
* minor cosmetical fix in dimension manager widget
* regionchooser.cpp: temporary fix for a crash which occured when gigedit
was compiled with CXXFLAGS="-g"

* as counterpart to latest LS commit: added experimental support to
synchronize gigedit with LinuxSampler to avoid race conditions / crash
while modifying data structures and playing the instrument with LS at
the same time
* packaging fixes: don't use a hard coded path to install the LS plugin
DLL, trying to substitute the given LS plugin directory by the
'${libdir}' automake variable (mandatory i.e. for Gentoo ebuild) and
include plugin/linuxsamplerplugin.h into the release tarball
('make dist')
* updated German translation (po/de.po)

* a changed file is now marked with an asterisk in the window title
* added close confirmation dialog, shown if file is changed
* "save" means "save as" for new files
* enabled acceleration keys
* add .gig to filename in "save as" if it's not already there
* filename character encodings other than utf-8 supported

* moved instrument editor into a shared library 'libgigedit', the 'gigedit'
binary is now just calling that shared library
* implemented an "instrument editor plugin" for LinuxSampler to allow
on-the-fly instrument editing within the sampler's own process
(this is an optional feature, auto detected at compile time)